firefox: remove --disable-xcode-checks

Apparently it's not needed anymore!

authored by Matthew Bauer and committed by GitHub 090985a4 77085f83

-1
-1
pkgs/applications/networking/browsers/firefox/common.nix
··· 185 "--disable-gconf" 186 "--enable-default-toolkit=${default-toolkit}" 187 ] 188 - ++ lib.optional stdenv.isDarwin "--disable-xcode-checks" 189 ++ lib.optional (lib.versionOlder version "61") "--enable-system-hunspell" 190 ++ lib.optionals (lib.versionAtLeast version "56" && !stdenv.hostPlatform.isi686) [ 191 # on i686-linux: --with-libclang-path is not available in this configuration
··· 185 "--disable-gconf" 186 "--enable-default-toolkit=${default-toolkit}" 187 ] 188 ++ lib.optional (lib.versionOlder version "61") "--enable-system-hunspell" 189 ++ lib.optionals (lib.versionAtLeast version "56" && !stdenv.hostPlatform.isi686) [ 190 # on i686-linux: --with-libclang-path is not available in this configuration